Cylinder-grinding machine



Dec, 16, 1924.

O. L. BEAN ET AL CYLINDER GRINDI NG MACHINE Filed Feb. ll, 1924 4 Sheets-Sheet 1 INVENTORS. elolLem Y J 6.5 .Mmmssen A TTORNE Y.

Dec. 16, -1924.

O. L. BEANET AL CYLINDER GRINDING MACHINE Filed Feb. 11, 1924 4 Sheets-Sheet 3 INVENTORS.

smzwseh/ Jvnes Va,

W ATTORNEY.

vO. L. BEAN ET AL CYLINDER GRINDING MACHINE Dec, 16,v 1924.

Filed Feb. ll, 1924 4 Sheets-Sheet 4 l INVENTORS: M0 L .Beam Jamas mamuasen Y W @Q/ ATTORNEY.

Patented Dec. 16, 1924.

UNITED STATES PATENT OFFICE.

OTHELLO L. BEAN AND JAMES W. RASMUSSE1N, OF LOS `ANGELES, CALIFORNIA, AS- SIGNORS T0 U. S. AND FOREIGN PATENTS HOLDING CO., OF LO'S ANGELES, CALI- FORNIA, A CORPORATION OF CALIFORNIA.

CYLINDER-GRINDING MACHINE.

Application led February 11, 1924.

To all whom z' may concern:

Be it known that we, QTHELLO L. BEAN and JAMES W. RAsMUssEN, citizens of the the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Cylinder-Grinding Machines, of which the following is a specification.

Our invention relates to grinding machines, and particularly to machines for engine cylinders and it is an improvement on our grinding machine disclosed in our application for United States Letters Patent, filed March 17, 1923, Serial No. 625,739.

rFhe general object of our invention is to provide a grinding machine of the `character stated which will be simple in construction and highly accurate and eflicient in operation.

A more particular object is to provide a cylinder grinding machine in which a reciprocating grinding wheel carrier is mounted in two spaced bearings whereby said carrier and grinding wheel are accurately guided so that said wheel will grind the cylinder accurately.

A further object is to provide a cylinder grinding machine including adjustable bearings for the grinding wheel carrier, whereby wear in said bearings may Kbe taken up, to cause the grinding wheel to grind accurately at all times.

A further object is to provide a grinding machine in which the motor shaft coincides with the grinding wheel spindle, so that the motor will more efficiently operate said grinding wheel.

Other objects and advantages will appear hereinafter and while we show herewith a-nd will describe a preferred form of construction, we desire to be understood that we do not limit ourselves to such preferred construction, but that various changes and adaptations may be made therein without departing from the spirit of our invention as hereinafter claimed.

Referring to the annexed drawing, which forms a part of this specification:

Fig. 1 is a side elevation of our cylinder grinding machine.

Fig. 2 is a fragmentary vertical section of the upper portion of our grinding machine.

Serial No. 691,915.

Fig. 3 is a fragmentary vertical section of the intermediate portion of our grinding machine. i

Fig L is a fragmentary vertical section of the lower portion of our grinding machine.

Fig. 5 is a horizontal section of our grinding machine taken on line 5-5 ofA Fig. 2.

Fig. 6 is a horizontal section of our grinding machine taken on line 6 6 of Fig. 3.

Fig. 7 is a side view of the worm driving gears of the grinding wheel carrier re ciprocating mechanism.

Fig. 8 is a horizontal section of our grinding machine taken on line 8-8 of Fig. 3.

Fig. 9 is a horizontal section of our grinding machine taken on line 9-9 of Fig. 10 is a horizontal section of our `grinding machine taken on line 10-1O of Fig. 3.

Fig. 11 is a horizontal section of our grinding machine taken on line 11-11 of Fig. 4.

Fig. 12 is a side view of the upper conical bearing bushing.

Fig. 13 is a side view of the lower coni cal 'bearing bushing.

Fig. 14 is a cross section of the lower bushing taken on line AWM: of Fig. 13.

Corresponding numerals designate corresponding parts throughout the several views.

In the drawing l indicates a tubular supporting standard which is formed with an external base flange 2 on its lower end and with a wide external flange 3 on its upper end. ard l is enlarged slightly so that its internal diameter will correspond to the internal diameter of the largest cylinder which the machine will grind, there being an annular shoulder 5 at the upper end of-said portion 4l, to which a collar 6 is secured by screws 7. The bore of the standard 1 is tapered upwardly at 8 from the shoulder 5 to a point 9 nearly midway between said shoulder and the upper end of the standard and tapered downwardly at 10 to a point 11 a short distance above the point 9. i

A split conical bushing 12 is fitted in The lower portion 4L of the standangles to the split 14 at 1'6 from its smalll end to a point 17 near its large end, thus giving said bushings the proper resiliency.

A collar 18 is secured centrally on the flange 3 by bolts 19, which collar engages the upper vend of cone 13 and holds said cones in place.

A cage 2O comprises a lower section 21 and an upper section 22. 'l'he section 21 comprises a lower ring 23, an upper ring 24, and standards 254 connecting said rings; said standards being spaced equi-'distant apart.

The cage 2O is mounted on the standard flange 3 and is secured thereto by means of bolts 26 which extend thro-ugh the ring 23 and screw into said ange, said ring resting on said flange. The section 22 comprises a lower ring 27, which rests on the upper ring 24 of section 21, three standards 28 spaced equi-distant apart and secured at their lower ends to said ring r27, and a vertical bearing 29 co-axial with the ring 27, to which bearing the upper ends of said standards are secured, which standards are bent inwardly 4and radially to said bearing.

The section. 22 is secured to the section 21 means of bolts 30, which extend through ring 27 and screw into the ring 24. The axis ofthe cage 20 including bea-ring 29 coincides with the axis of the standard 1 and the bearing bushings 12 and 13.

A carrier '31 comprises a Cylindrical plunger 32 and a cup-shaped base 33 secured on the upper end of said plungery said plunger extending through the bush-ings 12 and 13 in the standard 1, which bushings form the bearing for said plunger to reciprocate therein. Said plunger is provided1 with an eccen- -tri'c bore 34 extending therethrough in which is turnably mounted an eccentric stem 35, on the upper end of which is secured a disk 36, which r-ests in an eccentric recess' 37 in the Iupper face of the base 33, the center of said recess coinciding with the center of eccentric bore 34.

The stem 32 is provided with an eccentric bore 38 extending longitudinally therethrough, in which bore is turnably mounted ya grinding wheel, spindle v39 which extends from said bore. above 'the disk 36, and below the lower vend of the stem y32.

A grinding wheel 40` is secured on the lower end of the spindle 39 by a screw 41, which screw extends centrally through said grinding wheel and screws into the lower end of said spindle, there being a collar 42 interposed between the lower end of said spindle and the grinding wheel, the head 43 of the screw engaging the under side of the grinding wheel. Said screw is provided with `a longitudinal oil duc-t 44- which extends therethrough, and through a depending nozzle 45 on the screw head 43.

The lower end of the spindle is provided with a central oil duct 46 and with branch ducts 47 leading vfrom the upper end of duct 46 through the sides of the spindle 39 into the spindle bo-re 38, the lower end of the duct 46 communicating with the upper end of the screw duct 44, so that oil in the spindle bore 38, instead of'passing directly out of the end of said bore onto the grinding wheel 40 and spoiling the work, will pass through branch ducts 47, duct 46 and screw duct 44 below said grinding wheel.

A worm gear 50 is secured to the upper side of the disk '36 concentric with said disk and with the teeth thereof flush with the periphery of said disk. A worm 51 is j-ou'rnaled in bearings 52 on the upper face of base 33 in mesh with worm gear 50.

A bevel pinion 53 is formed 'on the end of one of the journals of worm 51, which pinion meshes with a bevel pinion 54 von the upper yend of -a vertical spindle 5'5 'extending through the base 33 and journaled in va bearing 56 in said base. Al thumb wheel 57 is -se- 'cured 'on the lower end of the'spindle 55 for rotating the spindle to rotate the disk 36 and stem 35 through the medium of bevel pinions 54 and 53, 'worm 51 and worm gear 50, whereby the grinding w-heel 4Q is' adjusted outwardly `or inwardly with relation to the axis of the plunger 32, so that the grinding wheel will grind cylinders of larger or smaller diameter.

The worm 51 and wor-m wheel 50 hold ythe grinding wheel '40 in any position to which lit is adjusted.

An end thrust bearing 60 is mounted on the upper face of the disk 36, the upper member 61 of said bearing being secured to the upper porti-on 'of the spindle 39, vand resting on balls 62, which are mounted in the lower bearing member 63, which is bolted to the disk 36 by bolts 64. Sai-d Yend 'thrust bearing supports the spindle 39 and grinding wheel 40 in operative position in the carrier 31. On the upper end of `spindle 39 is vsecured a roller 65.

A mntor cage 701 comprises three standards 71l bent inwardly at 72 near their upper ends and joined together at a center in a vertical sleeve 73. The lower yends of the standards 71 rest upon the base 33 atthe edge thereof and the cage 70 is secured to said base by bolts 74, which extend upwardly through the edge of ysaid base and screw into the lower 4ends of standards 71,

ber 75 rests on the disk 36 and is formed with an external flange 76 at its base, which is bolted by bolts 77 to said disk, whereby said member is secured on said disk, enclosing the bearing 60 and spindle 39 and roller 65, with the center of said member coincident with the axis of said spindle.

A hollow motor base 78 is bolted to the upper end of the supporting member by bolts 79, and an electric motor 80 rests upon said base and is secured thereto with its shaft 81 coincident with spindle 39 by bolts 82 extending` upwardly through said base and screw seated in the legs 83 of said motor.

The lower end of the motor shaft 81 extends -downwardly through the motor base 78 into the upper end of supporting member 75.

The grinding wheel and spindle shaft 39 are driven by the motor 80 at a speed substantially three and one-half times as fast as the motor shaft, through the medium of a friction clutch 85, which comprises a disk 86 secured on the lower end of motor shaft 81, friction rollers 87 swingably mounted on said disk, a conical bushing 88 fitted in the conical supporting member 75 in contact with said rollers 87, roller 65 with which said rollers 87 also contact, and springs 89 bearing at their lower ends upon disk 36 and at their upper ends against the lower edge of said bushing, whereby said bushing is maintained in frictional contact with the inner conical wall of said supporting member and the rollers 87 are maintained in frictional contact with said bushing and roller 65.

The rollers 87 are journaled at 90 at one end of arms 91 under the disk 86, which arms are pivoted at their other ends on bolts 92 which are screw seated in said disk.

A non-rotatable tubular plunger 95 extends through and is slidably mounted in the bearing 29, the lower end of said plunger resting on sleeve 73.

A rotatable tubular shaft 96 extends through and is journaled in tubular plunger 95, the lower end of said shaft being secured in the sleeve 73 at the top of the motor cage 70.

A gear 97 is secured on the lower end of the plunger 95 between the tops of cages 20 and 70 and meshes with a pinion 98 on the upper en-d of a vertical shaft 99 extending through and journaled in the upper structure of cage 70.

A pinion 100 is secured to the lower end of shaft 99 inside the cage 70 and meshes with a pinion 101 secured on a shaft 102 inside the cage 70, which shaft is journaled in a bearing 103 in the upper structure of said cage. A sprocket 103 is secured on the lower end of the shaft 102 within the motor cage 70 and a sprocket pinion 1041 is secured on the upper end of the motor shaft 81, over which sprocket and sprocket pinion extends a chain 105.

The bearing 29 .is split longitudinally at 106 and is formed with flanges 107 and 108 at opposite sides of said split, which flanges are bolted together by bolts 109 to contract the bearing to take up the wear of the plunger 95 therein.

A rack 110 is secured to the outside of plunger 95 longitudinally thereof, the bearing 29 being formed with a longitudinal external channel 111 in which said rack reciprocates and whereby said plunger is prevented from turning. The front of the channel 111 is provided with an opening 112 to accommodate a pinion 113, which meshes with rack 110 and is secured on a shaft 114e journaled in said channel and in a bearing 115 on a bracket 116 formed on the bearing 29.

A worin gear 117 is loose on shaft 113 and meshes with a worm 118 splined on a vertical shaft 119 between bearings 120, in which bearings the lower end of said shaft is journaled. A clutch 121 is mounted on the shaft 113 for clutching the worm gear 117 to said shaft. A plate 122 is secured on the upper end of the plunger 95 by a clamp 123. A bevel gear 124 is secured on the upper end of the shaft 96 abovethe plate 122 and an end thrust ball bearing 125 is interposed between said plate and bevel gear, which bearing sustains the motor cage 70 and the parts carried thereby.

A nut 126 screws on the upper end of the shaft 96 against the bevel gear 124 to hold the same and the upper' member of the end thrust bearing 125 in place on the shaft 90, and a lock nut 127 screws on said end of said shaft against the nut 126.

An electric switch 130 is mounted on the upper end of the hollow shaft 96, through which shaft the motor leads extend to the motor 80. A gear mounting 131 is mounted upon the plate 122 and a horizontal shaft 132 extends through said housing and is journaled in opposite vertical walls 133 and 134; thereof.

A bevel gear 135 'is secured on one end of shaft 132 outside the wall 133 in mesh with the bevel gear 1211-. A collar 136 is secured on the other end of shaft 132 outside the wall 134. A pair of bevel gears 137 and 138 are loosely mounted on the shaft 132 within the mounting' 131 in mesh with a bevel gear 139, in the lower part of said mounting, which bevel gear is secured on the upper end of shaft 119 which extends through the plate 122 and is journaled in a bearing 140 in said plate.

A pair of clutches 141 and 142 are mount- A clutch actuating lever 144 is pivoted at 145 on the upper part of the mounting 131, the lower .end of said lever being pivotally :connected at 146 tol the sleeve 143.

A. spring 147 is connected at its lower end at 148 to the plate 122 and at its upper end at 149 to the upper end of the lever 144. A horizontal arm 150 is formed on the lever 144 at the pivotal point thereof, through the .outer end of which arm extends a vertical rod 151 secured at its lower end to the bracket 116. On the upper end of said rod 151 is secured an adjustable stop 152 and an adjustable stop 153 is secured on said rod below the plate 122.

The operation of our cylinder grinding machine is as follows:

The base flange 2 is first bolted by bolts 1160 to the upper flange 161 of an engine cylinder 162. The circular movement of the aXis of the grinding wheel 40 is adjusted so that said grinding wheel will grind the interior of the cylinder' by turning the spindle by means of thumb wheel 57, whereby the eccentric head and stem 35 are rotated through the medium of bevel pinions 54 and 53, worm 51 and worm gear 50 until the grinding wheel 40 engages the inner surface of the cylinder 162, the grinding wheel being let down into the cylinder.

The stops 152 and 153 are then properly adjusted on the rod 151 to correspond to the length of the bore of the cylinder to give the grinding wheel a vertical stroke corresponding tothe length of said bore.

The moto-r 80 is operated upon closing the switch 130. The operation of the motor causes the motor shaft 81, through the medium of friction clutch 85, torotate the grinding wheel spindle 39 and grinding wheel '40, and causes said shaft through the ymedium of pinion 104, chain 105, sprocket 103, shaft 102, pinion 101, pinion 100, shaft 99, pinion 98 and gear 97, to rotate the :motor cage and the parts carried thereby, causing the spindle 39 and grinding wheel 40 to rotate in a circle eccentric to the center of plunger 32, whereby said grinding wheel is given its circular grinding movement in grinding the interior of the cylinder 162.

The rotation of the cage 70 rotates the shaft 96, bevel gears 124 and 135 and shaft 132. The grinding wheel 40 being at the top of the cylinder 162, the clutch 142 is thrown into operation by the lever 144 and the bevel gear 138 clutched to the shaft 132, whereby the cage 70 and partscarried thereby are lowered, through the medium of said bevel gear, bevel gear 139, shaft 119, worm 118, worm pinion 117 shaft 114, pinion 113 and rack 110, until the stop 153 engages the arm 150 and through lever 144 disengages 'clutch 142 and releases the bevel gear 138` 119, worm 118, worm gear 117, shaft 114,A

pinion 113 and rack 110 until the stop 152 engages arm 150 and throws the clutch 141 out of oper-ation and disconnects 'said bevel gear 137 from shaft 132, whereupon the ,spring 147 throws the clutch 142 again into operation `and the bevel gear 138 again clutched to the shaft 132, thus continuing the reciprocation of the cage 70 and parts carried thereby and giving the grinding wheel 40 its reciprocating grind-ing operation in .grinding the cylinder from end to end.

In case of wear ofthe bushing 12 a shim may be placed between the lower end-of said bushing and the collar 6 and the b-ushing forced upwardly and'contracted in the bore by bolts. 7 until the bushing fits the plunger 32 snugly.

In case of wear of the bushing 13, a shim may be placed between the upper end of said bushing and the collar 18 and said bushing forced downwardly yand contracted in the bore 10 until the bushing lits the plunger 32 snugly.

Having described our invention we claim:

1. In a grinding machine, a lower bearing, an upper beari-ng,-a carrie-r including a lower plunger reciprocatively mounted in said lower bearing, 'a spindle extending eccentrically and longitudinally through said plunger and journaled therein, a grinding wheel secured on the lower end of said spindle, ia motor, ineans for mounting said motor on said carrier, means for causing :said motor todrive said spindle and grinding wheel, a motor cage secured on said carriage, a non-rotatable hollow plunger recip- .rocative'ly mounted in said upper bearing, a rotatable shaft extending through and journaled in said non-rotatable plunger, `a gear secured on said non-rotatable plunger, a pinion jonrnaled on said motor cage and meshing with said gear, means to enable said motor to .drive said pinion to rotate said .motor cage and carri-er, and means driven vby said rotatable shaft for recirocating said carrier and the parts kcarried tliereby.

2. ln grinding machine, a bearing, a carrier including `a plunger reciprocatively mounted in said bearing, a spindle shaft journaile'd in said plunger, a grinding wheel secured on said spindle, a motor mounted on said carrier, the shaft of said motor being coincident with said spindle, and a clutch between said motor shaft and said sp-indle to enable said motor shaft to drive said spindle and said grinding wheel, said clutch including a disk secured on said motor shaft, arms pivotally mounted on said disk, rollers journaled on said arms, a roller secured on said spindle with which said first rollers contact, a conical member, a conical bushing fitted in said conical member with which bushing said first rollers contact, and springs for forcing said bushing into said conical member.

3. In a grinding machine, a lower bearing, an upper bearing, a carrier including a lower plunger reciprocatively mounted in said lower bearing, a spindle extending eccentrically and longitudinally through said plunger and journaled therein, a grinding wheel secured on the lower end of said spindle, a motor, means for mounting said motor on said carrier, means for causing said motor to drive said spindle and grinding wheel, a motor cage secured on said carriage, a non-rotatable hollow plunger reciprocatively mounted in said upper bearing, a rotatable shaft extending through and journaled in said non-rotatable plunger, a. gear secured on said non-rotatable plunger, a pinion journaled on said motor cage and meshing with said gear, means to enable said motor to drive said pinion to rotate said motor cage and carrier, a plate secured on the upper end of said non-rotatable plunger, a bevel gear on the upper end of said rotatable shaft, an end thrust bearing between said bevel gear and said plate, a mounting on said plate, a gear shaft journaled in said mounting, a bevel gear secured on said gear shaft meshing with said gear on said rotatable shaft, a pair of bevel gears loosely mounted on said gear shaft, a clutch for clutching each of said loosely vmounted bevel gears to said gear shaft, a shaft journaled at its upper end in said plate, a bevel gear secured on the upper end of said shaft in mesh with said loosely mounted bevel gears, a worm splined on said shaft, another shaft, a worm gear on said latter shaft meshing with said worm, a rack on said plunger, a pinion on said latter shaft meshing with said rack, and means for alternately throwing said clutches into operation to reverse the movement of said carrier and the parts mounted thereon.

t. In a grinding machine, a lower bearing, an upper bearing, a carrier including a -lower' plunger reciprocatively mounted in said lower bearing, a spindle extending eccentrically and longitudinally through said plunger and journaled therein, a grinding wheel secured on the lower end of said spindle, a motor, means for mounting said motor on said carrier, means for causing said motor to drive said spindle and grinding wheel, a. motor cage secured on said carriage, a non-rotatable hollow plunger reciprocatively mounted in said upper bearing, a rotatable shaft extending through and journaled in said non-rotatable plunger, a gear secured on said non-rotatable plunger, a pinion journaled on said motor cage and fmeshing with said gear, means to enable said motor to drive said pinion to rotate said motor cage and carrier, a plate secured on the upper end of said non-rotatable plunger, a bevel gear on the upper end of said rotatable shaft, an end thrust bearing between said bevel gear and said plate, a mounting on said plate, a gear shaft journaled in said mounting, a bevel gear secured on said gear shaft meshing with said gear on said rotatable shaft, a pair of bevel gears loosely mounted on said gear shaft, a clutch for clutching each of said loosely mounted bevel gears to said gear shaft, ashaft journaled at its upper end in said plate, a bevel gear secured on the upper end of said shaft in mesh with said loosely mounted bevel gears, a worm splined on said shaft, another shaft, a worm gear on said latter shaftmeshing with said worm, a rack on said plunger, a pinion on said latter shaft meshing with said rack, and meansv for alternately throwing said clutches into operation to reverse the movement of said carrier and the parts mounted thereon, said means comprising a lever pivoted on said mounting and engag ing one member of each of said clutches, an arm on said lever, a rod extending through said arm, a pair of stops on said rod for alternately engaging said stops at the ends of the stroke of said carrier and parts mounted thereon to alternately throw said clutches out of operation and alternately disengagt said loosely mounted beveled gears from said gear shaft, and a. spring connected to said lever and said mounting to throw each clutch into operation when the other is thrown out of operation by one of said stops.

GTHELLO L. BEAN. JAMES W. RASMUSSEN. 

